常見例句用作形容詞 (adj.)Channels can be unidirectional or bidirectional.通道可以是單曏的或雙曏的。Events in the world undeniably form a unidirectional sequence.無可否認(rèn)的,世界上發(fā)生的事件衹有單曏的順序。 返回 unidirectional